Insights d'ingénierie
Analyses approfondies des systèmes d'IA, de l'architecture cloud, des systèmes distribués et du leadership en ingénierie.
Loop Engineering for AI Agents: The Complete Guide
"I don't prompt Claude anymore. My job is to write loops." The complete guide to loop engineering: brakes, context rot, tool contracts, and the verifier that says no.
Kafka vs RabbitMQ vs SQS: Choosing a Message Broker
Kafka vs RabbitMQ dissolves once you name the workload: a log for facts many systems read and replay, a queue for jobs done once. The decision table and AI angle.
Database Indexing: How B-Trees Power Postgres and MySQL
The same query: 2ms or 3,000ms — the difference is one B-tree. How database indexes actually work, composite column order, covering indexes, and when the planner says no.
JWT vs Sessions: Authentication Architecture That Doesn't Bite Back
The decade-old JWT vs sessions fight has a boring answer: both, deliberately. Short access JWTs, rotating refresh tokens, httpOnly cookies, and a real revocation story.
Background Jobs and Task Queue Architecture: BullMQ, Celery, and SQS
The request cycle is for accepting work; the queue is for doing it. BullMQ vs Celery vs Sidekiq vs SQS, the five production requirements, and the AI-batch job shape.
gRPC vs REST vs GraphQL: Choosing an API Protocol in 2026
Stop asking which API protocol is best. REST at the edge, gRPC inside, GraphQL at the BFF — the boundary decision table, the 2026 AI-traffic wrinkles, and migration paths.
Speech-to-Text Pipeline Architecture: Whisper, Diarization, and Production Transcription
Whisper made transcription near-human. The engineering is everything around it: VAD, chunking, diarization, custom vocabulary, and the API-vs-self-hosted cost math.
Inverted Index Architecture: How Search Engines Work (BM25, Lucene, Elasticsearch)
The 40-year-old data structure behind every search engine — and the sparse half of modern RAG. Posting lists, segments, BM25 scoring, and Lucene to Elasticsearch.
Agentic Commerce Architecture: AI Agent Payments with AP2, ACP, and x402
AI agents are becoming buyers, and checkout assumed a human. AP2 mandates, ACP buy-in-chat, and x402 micropayments — the architecture merchants and platforms must build.
v0 vs Lovable vs Bolt vs Replit: AI App Builders Compared
Prompt-to-app builders collapse weeks into hours — then hit the same wall. v0 vs Lovable vs Bolt vs Replit honestly compared, and how to graduate to production.
Parameter-Efficient Fine-Tuning (PEFT) Beyond QLoRA: DoRA, GaLore, and LoftQ
QLoRA is no longer the automatic answer. DoRA for accuracy, LoftQ for quantization damage, GaLore for full-parameter training on small memory — the 2026 PEFT map.
n8n AI Workflow Automation: Architecture, Agents, and When to Use It
Most AI value in a business is glue. n8n vs Zapier vs Make vs custom code, the LLM/agent/RAG node layer, the flows that earn money, and how to run it seriously.
Run LLMs Locally: Ollama vs llama.cpp vs LM Studio vs vLLM
Privacy by construction, zero per-token cost, fully offline. Ollama vs llama.cpp vs LM Studio vs vLLM — the honest comparison, hardware math, and when local loses.
LLM Knowledge Distillation: Teacher-Student Architecture for Smaller, Cheaper Models
Stop paying frontier prices for commodity work. Teacher-student distillation: methods, transfer-set design, the 30-100x cost math, and when not to do it.
How to Build an MCP Server: Tools, Resources, and Production Architecture
A working MCP server fits in 100 lines. Production is the hard part: tool schema design, stdio vs Streamable HTTP, OAuth 2.1, output caps, and audit logging.
Claude Opus 4.8 vs Sonnet 5 vs Fable 5: Which Model for Which Task
Opus 4.8, Sonnet 5, or Fable 5 — official pricing, positioning, and a task-fit decision framework, grounded in Anthropic's own docs, not contradictory third-party leaderboards.
TPU Inference Architecture: Serving LLMs on Trillium with vLLM
GPU is not the only serving option in 2026. TPU (Trillium) cost-per-token, the XLA compilation model, vLLM TPU backends, and agent-driven ops for self-hosted LLMs.
Local-First Architecture: CRDTs, Sync Engines, and Offline-First Apps for 2026
The industry over-corrected toward routing everything through the cloud. Local-first architecture: CRDTs, sync engines, and why apps should work offline by default.
Deep Agents Architecture: Planning, Sub-Agents, and File-System Memory for Long-Horizon Tasks
A simple tool-calling loop collapses on a 100-step task. Deep agents fix it with planning, sub-agents, and a file system as memory — the long-horizon agent pattern.
Prompt Caching Architecture for LLM Apps & Agents: Prefix Caching, Cost, and Latency
Agents and RAG apps re-send the same long prefix every turn. Prompt caching cuts input cost up to ~90% and speeds first tokens — the win most teams leave off.
Gardez une longueur d'avance
Analyses hebdomadaires approfondies sur les systèmes d'IA, l'architecture cloud, les systèmes distribués et le leadership en ingénierie. Rejoignez plus de 5 000 ingénieurs.